# Bead on a wavy wire

**Classical Mechanics**Level 4

A bead slides down on a frictionless wire, starting from rest at point A. The section from A to B is straight while the section from B to C is wavy (with wavelength \(\lambda\ll L\)). The total length of the stretched wire is \(3L\). If \(L=50~\text{cm}\), determine the time **in seconds** it takes for the bead to reach point C. Assume that the bead slides **smoothly** at all times.

**Details and assumptions**

\[g=9.8~\text{m}/\text{s}^2\]